174 lines
3.8 KiB
JavaScript
174 lines
3.8 KiB
JavaScript
/**
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* 加密类 md5/sha1/base64
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* @author yutent<yutent.io@gmail.com>
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* @date 2020/09/16 18:11:51
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*/
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const fs = require('fs')
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const Helper = require('./lib/helper.js')
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const PID = process.pid
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const PPID = process.ppid
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var __inc__ = 1024
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/**
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* [base64encode base64编码]
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* @param {Str/Num/Buffer} str [要编码的字符串]
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* @param {bool} urlFriendly [是否对URL友好，默认否，是则会把+转成-，/转成_]
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*/
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Helper.base64encode = function(str, urlFriendly) {
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var buf, str64
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if (Buffer.isBuffer(str)) {
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buf = str
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} else {
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buf = Buffer.from(str + '')
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}
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str64 = buf.toString('base64')
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if (urlFriendly) {
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return str64
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.replace(/\+/g, '-')
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.replace(/\//g, '_')
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.replace(/=/g, '')
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}
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return str64
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}
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/**
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* [base64decode base64解码, 返回Buffer对象]
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* @param {Str} str [要解码的字符串]
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* @param {bool} urlFriendly [之前是否对结果采用了URL友好处理]
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*/
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Helper.base64decode = function(str, urlFriendly) {
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if (urlFriendly) {
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str = str
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.replace(/-/g, '+')
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.replace(/_/g, '/')
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.replace(/[^A-Za-z0-9\+\/]/g, '')
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}
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return Buffer.from(str, 'base64')
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}
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/**
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* [rand 生成指定长度的随机字符串]
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* @param {[type]} len [要得到的字符串长度]
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* @param {[type]} forceNum [是否强制返回纯数字]
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*/
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Helper.rand = function(len, forceNum) {
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let str = 'qwertyuiopasdfghjklzxcvbnmQWERTYUIOPASDFGHJKLZXCVBNM0123456789'
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if (forceNum) {
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str = '0123456789'
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}
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let max = str.length
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let tmp = ''
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for (let i = 0; i < len; i++) {
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let r = (Math.random() * max) >> 0
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tmp += str[r]
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}
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return tmp
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}
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// 返回一个如下格式的 xxxxxxxx-xxxx-xxxx-xxxxxxxx 的唯一ID
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Helper.uuid = function(pipe = '-') {
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var rand = Helper.origin.randomBytes(8).toString('hex')
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var now = (~~(Date.now() / 1000)).toString(16)
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var inc
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__inc__++
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if (__inc__ > 65535) {
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__inc__ = 1024
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}
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inc = (__inc__ + PID + PPID).toString(16).padStart(4, '0')
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return now + pipe + inc + pipe + rand.slice(0, 4) + pipe + rand.slice(-8)
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}
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/**
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* [md5 md5加密]
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* @param {Str/Num} str [要加密的字符串]
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* @param {Str} encode [hex/base64]
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*/
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Helper.md5 = function(str, encode) {
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if (typeof str === 'number') {
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str += ''
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}
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if (typeof str === 'string' || Buffer.isBuffer(str)) {
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return Helper.hash('md5', str, encode)
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}
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return str
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}
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/**
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* [md5Sign 获取文件的md5签名]
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* @param {Str} file [文件路径]
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*/
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Helper.md5Sign = function(file) {
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if (fs.accessSync(file, fs.constants.R_OK)) {
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var buf = fs.readFileSync(file)
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return Helper.hash('md5', buf)
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}
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return null
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}
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/**
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* [sha1 sha1加密]
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* @param {Str/Num} str [要加密的字符串]
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* @param {Str} encode [hex/base64]
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*/
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Helper.sha1 = function(str, encode) {
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if (typeof str === 'number') {
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str += ''
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}
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if (typeof str === 'string' || Buffer.isBuffer(str)) {
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return Helper.hash('sha1', str, encode)
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}
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return str
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}
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/**
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* [sha1Sign 获取文件的sha1签名]
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* @param {Str} file [文件路径]
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*/
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Helper.sha1Sign = function(file) {
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if (fs.accessSync(file, fs.constants.R_OK)) {
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var buf = fs.readFileSync(file)
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return Helper.hash('sha1', buf)
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}
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return null
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}
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/**
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* [sha256 sha256加密]
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* @param {Str/Num} str [要加密的字符串]
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* @param {Str} encoding [hex/base64]
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*/
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Helper.sha256 = function(str, encoding) {
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if (typeof str === 'number') {
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str += ''
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}
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if (typeof str === 'string' || Buffer.isBuffer(str)) {
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return Helper.hash('sha256', str, encoding)
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}
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return str
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}
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/**
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* [sha256Sign 获取文件的sha256签名]
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* @param {Str} file [文件路径]
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*/
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Helper.sha256Sign = function(file) {
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if (fs.accessSync(file, fs.constants.R_OK)) {
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var buf = fs.readFileSync(file)
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return Helper.hash('sha256', buf)
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}
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return null
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}
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module.exports = Helper
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